Skin Colour / Pigmentation & Tone

Measuring skin colour evenly and safely, across zones

We quantify pigmentation and tone with objective indices to map unevenness, sun damage, and redness. This helps us target brightening, calm inflammation, and prevent post-inflammatory marks.

Objective colour indices Standardised lighting Tracked over time

What we measure

We use colour-calibrated imaging and/or a handheld colorimeter to capture:

  • Melanin Index (MI): proxy for brown pigment levels
  • Erythema Index (EI): proxy for redness/inflammation
  • L*a*b* values: lightness and hue for evenness tracking
MI
Melanin Index
EI
Erythema Index
Δ Evenness
Change vs baseline

How it works

We capture images in controlled conditions and take spot readings at set points (forehead, cheeks, chin). Calibrated targets ensure consistency. Results are averaged and trended over time.

  • Consistent distance, angle, and light profile
  • Multiple readings per zone for reliability
  • Environment (light, temperature) recorded

What your reading means

Elevated MI suggests increased pigmentation; elevated EI indicates redness or irritation. We tailor brightening (e.g., azelaic, vitamin C, retinoids), barrier support, and in-clinic options (peels, lasers), pacing intensity to minimise post-inflammatory risk.

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